<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>姓名案例_计算属性简写实现 </title>
    <script src="../vue.js"></script>
</head>

<body>
    <div id="root">
        姓：<input type="text" v-model="firstName"><br><br>
        名：<input type="text" v-model="lastName"><br><br>
        姓名：<span>{{fullName}}</span>
    </div>
    <script>
        Vue.config.productionTip=false;
        const vm=new Vue({ 
            el: '#root',
            data: {
                firstName:'黑',
                lastName:'三'
            },
            computed:{
                //完整写法
                /* fullName:{
                    get(){
                        return this.firstName+'-'+this.lastName
                    },
                    set(value){
                        const arr=value.split('-');
                        this.firstName=arr[0];
                        this.lastName=arr[1];

                    }
                } */
                //简写
                fullName(){
                    return this.firstName+'-'+this.lastName
                }
            }
        })
    </script>
</body>

</html>